Nut-lock.



S. E. CREASEY.

NUT LOCK.

nruornon FILED Jun 4. 1914.

1,1 18,745, Patented Nov. 24, 1914.

WITNESSES 5 f/ZlfE/V TOR A/IUEL RIF/1S5) Z: Z

wk 11 TTORNE Y8 THE NORRIS PETERS CO. FHOTO-LITHOV. WAS'HNGYON. D C

SAMUEL ELLIOTT CREASEY, OF ALFRED, MAIN E.

NUT-LOOK.

Specification of Letters Patent.

Application filed June 4, 1914. Serial No. 842,908.

To all whom it may. concern:

Be it known that I, SAMUEL E. CREASEY, a citizen of the United States,and a resident of Alfred, in the county of York and State of Maine, haveinvented a new and Im: proved Nut-Lock, of which the followingpis afull, clear, and exact description Among/the principal objects which thepresent invention has in view are: to provide means for holding two nutson a bolt, the one from a rotary movement and the other from alongitudinal movement relative to the bolt; to provide means for lookinga nut on a bolt, said means being adapted for withdrawal from operativeposition when engaged by a follower nut; andvto provide a follower nutand a relatively slid.

able member to engage a clamping nut to cut the threads thereof so as toprevent the revolution of the nut on its bolt.

Drawings-Figure 1 is a side view of a bolt, clampingnut, follower nut,and looking wedge, all constructed and arranged in accordance with thepresent invention; Fig. 2 is a longitudinal section of the same, thesection being taken on the line 2-2 of Fig. 1; Fig. 3 is a detail endview, on an enlarged scale, of a lockingwedge for connecting theclamping andfollower nuts employed in the present invention.Description-As shown in the accompanying drawings, the bolt, such asthat indicated by the numeral 8, Is provided with a groove 9 formedlengthwise of the threaded section of said bolt and terminating at theshank 10 thereof. The threads of the bolt 8 are trued or cleared afterthe groove 9 is formed, to avoid a bur which might otherwise interferewith the threads of the clamping nut 11 when the same is placed upon thebolt 8. The groove 9 is formed as a runway for the wedge 12. Thewedge.12 is furnished with a cutting edge 13, the function of which isto cut the thread of the nut 11 when forced thereunder by a follower nut14. To engage the follower nut 14, and to steady and guide the samewhile being adjusted to the bolt 8 and to the screw-thread formedthereon, the wedge 12 is provided with a spread head 15, the inner edge16 whereof. is concentric with the bolt 8, and the curvewhereof has aslightly greater radius than the top of the thread on said bolt, theobject being; to clear the same. The outer edge 17 of the head 15 iscurved to correspond withthe outer wal. 18 of an annular groove 19formed .interiorly in the extension 20 with which the nut 14 isprovided. The nut 14 is provided with an extension 20, whereinisprovided an annular groove 19. The under wall 21 of the extension 20 iscentrally perforated to form a bolt-hole having a slightly largerdiameter than the thread of the bolt 8. The wall 21 extends to the outerside of the head 15, and in the manipulation of the nut. 14, exerts apull on the wedge 12 to dislodge the same when it is desired to releaseor remove the nut 11. p

Operati0n.-The bolt 8 is placed inservice, and the nut 11 is engagedwith the threads thereof and set up in clamping relation to thestructure to be held, substantially as shown in Fig. 1 of the drawings.The wedge 12 is then introduced into the groove 9, the flange 15 being.extended beyond the outer end of the bolt 8 and beyond the terminus ofthe groove 9. While the wedge is held in this position, the nut 14 isadjusted with relation thereto, the groove 19 being fitted over theflange 15. The out 14 1 and wedge 12 are now moved toward the nut 11until. the thread of the nut 14 engages the thread of the bolt 8. Asabove explained, the operation of engaging the thread of the nut 14 withthe thread of the bolt 8 is facilitated by the support and guidanceafforded said. nut by the head 15. When the thread of the nut 14:engages the thread of the bolt 8, the nut 1 1 is manipulated in aconventional manner. As said nut advances toward the nut 11, the wedge12 is carried lengthwise of the groove 9, ultimately having the endthereof inserted under the thread of the nut 11, where the sameoverhangs the groove 9. When the cutting edge 13 of the edge meets thethread of the nut 11, it is cut or deeply indented by the wedge12,pressure being applied to said wedge by means of the nut 14. It will beunderstood that the amount of pressure applied to the wedge 12, and theextent to which it is forced to cut the thread on the nut 11, areoptional. The construction is such as admits of a very positive andextensive operation. The strengthof the threads of the nut 1d and thebolt 8 forms the limit to which thepressure may be introduced upon thewedge 12..

It is obvious that when the nut 11 and the wedge 12 carried thereby havebeen fully set up in position, the nut 11 cannot rotate Patented Nov.24, 1914..

on the bolt 8, and the nut 14 may not rotate backward to move lengthwiseof the bolt, the incidental power exerted by the nut 14, outward, beingtotally inadequate to withdraw the wedge 12 from frictional engagementthereof on the nut 11. 1

Claims:

1. A nut lock comprising a bolt having a screw-threaded section and agroove formed longitudinally therein; a clamping nut having a thread tofit the threaded section of said bolt; a follower nut having an endextension provided with an interior annular groove; and a wedge adaptedfor mounting in the groove in said bolt and having an outwardlyextendingcutting edge, a portion of said wedge being outwardly extended to fitsaid groove in said follower nut.

2. A nut lock comprising a bolt having a screw-threaded section andagroove formed longitudinally therein; a clamping nut having a thread tofit the threaded section of 4 said bolt; a follower nut having an endextension provided with an interior annular groove; a wedge adapted formounting in the groove in said bolt and having an outwardly-extendingcutting edge; and a head mounted on said wedge, outwardly-extendedtherefrom and curved to conform with the Copies of this patent maybe'obtained for five cents each; by addressing the Commissioner ofPatents,

Washington, D. 0."

